JP2010138744A - Vane rotary type compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vane rotary type compressor of low noise and high salability. <P>SOLUTION: This vane rotary compressor includes a cylinder 3 including a cylindrical hollow part therein, a roughly cylindrical shape rotor 4 rotatably disposed with at least a part of an outer circumference part put close to an inner wall surface of the cylinder 3, and a vane 5 slidably inserted in a vane groove 4b of the rotor 4, abutting on an inner wall surface of the cylinder 3 at a distal end thereof, and dividing a compression space formed between the cylinder 3 and the rotor 4 into at least a suction space 18 and a delivery space 19. The vane rotary compressor includes a suction hole 10 communicating to the suction space 18 and a delivery hole 11 communicating to the delivery space 19. Projection delay of the vane during compressor start is prevented by providing a spring 6 at a rear end part 5a of the vane 5, and salability is improved. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a compressor that compresses a gas fluid, and relates to a vane rotary type compressor used in, for example, an automobile air conditioner.

  Conventionally, this type of vane rotary compressor for a vehicle rotates a pulley of an electromagnetic clutch via a belt by a driving force of an engine and performs a compression operation by turning on / off the electromagnetic clutch. 7 and 8 show a conventional vane rotary compressor described in Patent Document 1. FIG. As shown in FIG. 8, a cylinder 51, a rotor 52, a vane groove 53 formed in the rotor 52, a vane 54, a suction port 55, a working chamber 56, a discharge port 57, a discharge valve 58, and the like. It is configured.

When the electromagnetic clutch is turned on, the rotor 52 rotates and gas or oil is supplied from the rear case 61 through the back pressure applying device 62 to the vane groove 53 portion. As a result, the pressure in the vane groove 53 increases, the vane 54 jumps out of the vane groove 53 of the rotor 52, and the vane tip collides with the cylinder inner surface 59. Thereafter, the tip of the vane 54 is inscribed in the cylinder inner surface 59 and rotates together with the rotor 52, whereby the refrigerant is compressed in the working chamber 56, and the compressed refrigerant is discharged from the discharge port 57 (see, for example, Patent Document 1). .
JP 2003-090286 A

  In the conventional configuration, a pressure is applied to the back portion of the vane groove 53 by supplying gas or oil from the rear case 61 through the back pressure applying device 62. Therefore, in the case of the above-described conventional configuration, at the time of starting the compressor, a supply delay of gas or oil occurs in the vane groove 53 portion, the vane is delayed, and chattering may occur.

  The present invention solves the above-described conventional problems, and an object of the present invention is to provide a vane rotary compressor that prevents chattering and has high commercial properties.

  In order to solve the above-described conventional problems, a vane rotary compressor according to the present invention includes a cylinder having a cylindrical hollow portion therein, and at least a part of an outer peripheral portion thereof being rotatable in proximity to the inner wall surface of the cylinder. A substantially cylindrical rotor, and a compression space formed between the cylinder and the rotor, the tip of which is slidably inserted into the vane groove of the rotor and the tip abuts against the inner wall surface of the cylinder. At least a vane that divides into a suction space and a discharge space, a front side plate and a rear side plate that close both ends of the cylinder to form a compression chamber, a suction hole that communicates with the suction space, and a discharge hole that communicates with the discharge space In the vane rotary compressor, a spring is provided on the side of the vane that enters the vane groove (hereinafter referred to as a vane rear end).

  As a result, when the compressor is started, the vane can be forcibly pushed out by the spring, and the vane can be surely pressed against the cylinder. It is possible to provide a vane rotary compressor that is less likely to cause ringing and has high commercial properties.

INDUSTRIAL APPLICABILITY The present invention can provide a vane rotary type compressor that prevents chattering and has a high commercial value.

  According to a first aspect of the present invention, there is provided a cylinder having a cylindrical hollow portion therein, a substantially cylindrical rotor in which at least a part of an outer peripheral portion is rotatably disposed close to an inner wall surface of the cylinder, and the rotor A vane that is slidably inserted into the vane groove of the cylinder, has a tip abutting against the inner wall surface of the cylinder, and divides a compression space formed between the cylinder and the rotor into at least a suction space and a discharge space, and both ends of the cylinder A vane rotary compressor comprising a front side plate and a rear side plate constituting a compression chamber, a suction hole communicating with the suction space, and a discharge hole communicating with the discharge space, the rear end portion of the vane By adopting a configuration in which a spring is provided, vane out delay is less likely to occur and chattering can be prevented, so that a quiet and highly productive compressor can be provided.

  In the second invention, the spring of the first invention is a coil spring, and a recess is provided at a position facing the vane rear end portion and the vane rear end portion of the rotor. Can be installed at low cost.

  According to a third aspect of the present invention, the entrance portion of the concave portion of the second aspect is tapered so that when the spring expands and contracts, the spring is smoothly inserted into the hole even if the spring is bent. Will not be disturbed.

  According to a fourth aspect of the present invention, the spring of the first aspect is a gas spring, and a recess is provided in at least one of the positions facing the vane rear end and the vane rear end of the rotor, and the recess is inserted into the recess. With this configuration, the gas spring does not generate spring deflection during expansion and contraction unlike a general coil spring, so that the spring does not hinder the movement of the vane and can reliably push out the vane.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 is a longitudinal sectional view of a vane rotary compressor according to a first embodiment of the present invention, FIG. 2 is a sectional view of a working chamber of the compressor, and FIG. 3 is a sectional view taken along line AA in FIG. It is.

  As shown in FIGS. 1 and 2, the working chamber 8 for compressing the refrigerant in the vane rotary type compressor of the present invention is fixed by the front side plate 1 and the rear side plate 2, and the refrigerant suction hole 10 and the compressed refrigerant are compressed. The discharge hole 11 is provided. Further, the discharge hole 11 communicates with a high-pressure case 13 provided in the rear case 12 through a passage. In the rear case 12, a separation device (not shown) for separating the lubricating oil from the compressed refrigerant, an oil storage chamber 17, and a back pressure applying device 14 are provided.

  As shown in FIG. 2, the working chamber 8 includes a cylinder 3 having a cylindrical hollow portion inside, and at least a part of the outer peripheral portion provided in the cylinder 3 is rotatable close to the inner wall surface of the cylinder 3. A substantially cylindrical iron rotor 4 is provided. The rotor 4 has a plurality of vane grooves 4b substantially radially, and is slidably inserted into the vane groove 4b, the tip abuts against the inner wall surface of the cylinder 3, and a compression formed between the cylinder 3 and the rotor 4 A vane 5 is provided to partition the space into at least a suction space and a discharge space. A suction hole 10 communicating with the suction space 18 is provided on the suction side of the working chamber 8, and a discharge hole 11 and a discharge valve 9 communicating with the discharge space 19 are provided on the discharge side.

Further, as shown in FIG. 1, the rear case 12 is fixed to the rear side plate 2, and the high-pressure case 1
The back pressure is applied to the vane groove 4b by appropriately switching the compressed refrigerant that has become the high-pressure gas fluid in the cylinder 3 and the lubricating oil accumulated in the oil storage chamber 17 and supplying the oil to the oil groove 15 from the oil supply passage. A device 14 is provided. The back pressure applying device 14 controls the communication and blocking operation of a valve mechanism including a ball valve and a ball seat by a pressure difference between the suction space 18 or the discharge space 19 in the working chamber 8 and the high pressure case 13 or the oil storage chamber 17. Thus, the vane 5 is surely pressed against the rotor 4 by applying the necessary back pressure.

  As shown in FIGS. 2 and 3, a coil spring 6 is installed at the vane rear end 5a of the vane rotary compressor according to the present embodiment. A configuration in which a cylindrical hole (vane recess 5b, rotor recess 4c) for holding the coil spring 6 is opened in the vane groove 4b, which is a position facing the vane rear end 5a and the vane rear end 5a of the rotor 4. It has become. Therefore, the coil spring 6 can be installed between the vane rear end portion 5a and the vane groove 4b. Here, in the position shown by B in FIG. 2, the vane 5 is completely accommodated in the vane groove 4b, and the coil spring 6 provided in the vane groove 4b is contracted by force. It is. Therefore, in a state before the compressor is started, a repulsive force is always applied to the vane 5.

  About the vane rotary compressor comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When the electromagnetic clutch is turned on and the compressor is started, the rotor 4 connected to the drive shaft 4a starts to rotate, the refrigerant is sucked into the working chamber 8, and the refrigerant is compressed.

  At this time, since the vane 5 receives the repulsive force of the coil spring 6 installed in the vane groove 4b as described above, it is pushed out toward the inner wall surface of the cylinder 3 simultaneously with the rotation of the rotor 4. Similarly, other vanes 5 out of the three vanes 5 are also repelled by the coil spring 6 when they reach the position B in FIG.

  Moreover, the vane 5 can always be forcedly pushed out by making the length of the coil spring 6 into the length which will be contracted even if it exists in the position where the vane 5 protruded most and it will be in the state which applied the repulsive force. That is, when lubricating oil or refrigerant is supplied to the vane groove 4b by the back pressure applying device 14, it is necessary that a pressure difference is generated due to the refrigerant being compressed by the compressor, but the coil spring 6 of the present invention. According to the configuration using, there is no need, and a force for forcibly pushing out the vane 5 is generated.

  Further, after the vane 5 is pushed out from the position B shown in FIG. 2 by the repulsive force of the coil spring 6 at the same time as rotating, the communication hole 16 provided in the rear side plate 2 and communicating with the back pressure applying device 14 and the rear side plate 2 are provided. Oil or refrigerant is supplied through an oil groove 15 received in a C shape. For this reason, since the vane 5 can be steadily pressed against the inner wall surface in the cylinder 3, it is possible to prevent a reduction in capacity due to idling of the compressor and noise due to chattering of the vane 5.

  As described above, the vane rotary compressor according to the present embodiment can reliably push out the vane 5 even at the time of start-up, the vane discharge delay is less likely to occur, the back pressure is insufficient, and the behavior of the vane 5 is reduced. Since it can prevent chattering from occurring due to instability, it is possible to provide a quiet and highly commercial compressor.

  In the present embodiment, it is possible to stabilize the behavior of the vane 5 by arranging a plurality of the coil springs 6 equally.

  Further, by setting the length of the coil spring 6 to be longer than that from the vane rear end portion 5a to the bottom of the vane groove 4b, the coil spring 6 does not fall off from the vane recess 5b and the rotor recess 4c.

  Further, in the present embodiment, the back pressure applying device 14 is used to apply the back pressure to the vane 5. However, the back pressure is applied by utilizing the pushing force generated by the repulsion of the spring as in the present invention. There is a possibility that the device 14 is unnecessary or can be realized by a simple configuration.

(Embodiment 2)
The vane rotary compressor according to the present embodiment has an inlet portion of a cylindrical hole (vane recess 5b, rotor recess 4c) provided in the vane rear end 5a and the vane groove 4b, particularly in the first embodiment. Tapered shape. The same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  FIG. 4 is a cross-sectional view taken along the line CC of the vane rotary type compressor according to the second embodiment of the present invention.

  As shown in FIG. 4, a coil spring 6 is installed at the vane rear end 5a. A vane concave portion 5b and a rotor concave portion 4c for holding the coil spring 6 are formed in the vane rear end portion 5a and the vane groove 4b, and the inlet portion has a tapered shape.

  About the vane rotary compressor comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When the compressor 4 is started and the rotor 4 rotates, the vane 5 at the position shown in FIG. 2B receives the repulsive force of the coil spring 6 installed in the vane groove 4b. At the same time, it is forced out toward the inner wall surface of the cylinder 3.

  In addition, after the vane 5 is rotated by the repulsive force of the coil spring 6 simultaneously with the rotation from the position B, the back pressure is supplied by the back pressure applying device 14 to steadily press the vane 5 against the inner wall surface in the cylinder 4. Can do. For this reason, it is possible to prevent a decrease in capacity due to idling of the compressor and noise due to chattering of the vanes 5.

  Furthermore, in the present embodiment, the entrance portions of the vane recess 5b and the rotor recess 4c are tapered, so that the spring of the spring itself is reduced in the process of contracting the coil spring 6 like the vane 5 at the position shown in FIG. Even if the coil spring 6 is deflected by the reaction force, it can be smoothly inserted into the vane recess 5b and the rotor recess 4c, so that the vane 5 can be pushed out reliably and the coil spring 6 is not caught on the vane 5. It becomes possible to slide smoothly in the groove 4b.

(Embodiment 3)
In this embodiment, the coil spring 6 is a gas spring 7 particularly in the first embodiment. The same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  FIG. 1 is a cross-sectional view of a vane rotary compressor according to a third embodiment of the present invention, FIG. 5 is a cross-sectional view of the working chamber, and FIG. 6 is a cross-sectional view of A′-A ′.

As shown in FIGS. 5 and 6, a gas spring 7 is installed at the rear end of the vane 5. In the vane rear end portion 5a and the vane groove 4b, a cylindrical hole for holding the gas spring 7 (
The vane recess 5b and the rotor recess 4c) are open. For this reason, the gas spring 7 can be installed between the vane rear end 5a and the vane groove 4b. Here, at the position indicated by B in FIG. 5, the vane 5 is completely accommodated in the vane groove 4b, and the gas spring 7 provided in the vane groove 4b is contracted by force. State. Therefore, in a state before the compressor is started, a repulsive force is always applied to the vane 5.

  About the vane rotary compressor comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When the compressor 4 is started and the rotor 4 rotates, the vane 5 at the position shown in FIG. 5B receives the repulsive force of the gas spring 7 installed in the vane groove 4b. At the same time, it is forced out toward the inner wall surface of the cylinder 3.

  In addition, after the vane 5 is rotated from the position B and pushed out by the repulsive force of the gas spring 7, the back pressure is supplied by the back pressure applying device 14 and steadily presses the vane 5 against the inner wall surface in the cylinder 4. be able to. For this reason, it is possible to prevent a decrease in capacity due to idling of the compressor and noise due to chattering of the vanes 5.

  Further, in the present embodiment, since the gas spring 7 is provided, the spring does not bend like a general coil spring. Therefore, the vane 5 is not affected by the gas spring 7 except for the repulsive force. It becomes possible to slide smoothly in the groove 4b.

  In the first and second embodiments, the recesses (vane recess 5b and rotor recess 4c) are provided on both the vane side and the rotor side. However, the gas spring 7 does not bend as described above. Therefore, it is possible to fix the gas spring 7 by providing it in either one.

  As described above, the vane rotary type compressor according to the present invention can provide a vane rotary type compressor with low noise and high merchantability, and can also be applied to uses such as compressors for automobile air conditioners.

Cross-sectional view of a vane rotary compressor according to Embodiments 1 to 3 of the present invention Working room sectional view of a vane rotary type compressor in Embodiment 1 of the present invention. AA sectional view of the vane rotary compressor CC sectional drawing of the vane rotary type compressor in Embodiment 2 of this invention. Working room sectional view of a vane rotary type compressor in Embodiment 3 of the present invention. A'-A 'sectional view of the vane rotary compressor Cross-sectional view of a conventional vane rotary compressor Vertical sectional view of the vane rotary compressor

Explanation of symbols

1 front side plate 2 rear side plate 3 cylinder 4 rotor 4a drive shaft 4b vane groove 5c rotor recess 5 vane 5a vane rear end 5b vane recess 6 coil spring 7 gas spring 8 working chamber 9 discharge valve 10 suction hole 11 discharge hole 12 rear case 13 High pressure case 14 Back pressure applying device 15 Oil groove 16 Communication hole 17 Oil storage chamber 18 Suction space 19 Discharge space

Claims (4)

A cylinder having a cylindrical hollow portion therein, a substantially cylindrical rotor in which at least a part of the outer peripheral portion is rotatably disposed near the inner wall surface of the cylinder, and a slide in a vane groove of the rotor A vane that is movably inserted, has a tip abutting against the inner wall surface of the cylinder, partitions a compression space formed between the cylinder and the rotor into at least a suction space and a discharge space, and closes both ends of the cylinder to close the compression chamber. A vane rotary compressor having a front side plate and a rear side plate, a suction hole communicating with the suction space, and a discharge hole communicating with the discharge space, wherein the vane has a spring at a rear end portion of the vane Rotary compressor. 2. The vane rotary compressor according to claim 1, wherein a recess is provided at a position facing the vane rear end and the vane rear end of the rotor, and a coil spring is inserted into the recess. The vane rotary compressor according to claim 2, wherein the entrance of the recess is tapered. 2. The vane rotary compressor according to claim 1, wherein a recess is provided in at least one of a position of the vane rear end facing the vane rear end of the rotor, and a gas spring is inserted into the recess.